- rigid
- adj1. stiff, hard, inflexible, unflexible, non-flexible, unbendable, unbending, unyielding; inelastic, unplastic, nonpliant, unmalleable, nonmailable; tight, tense, taut, Inf. stiff as a poker, Inf. stiff as a ramrod.2. fixed, set, firm, immovable, unalterable, unchangeable, unvarying, hard and fast, ironclad; unde-viating, unswerving, resolute, steadfast, resolved, determined, tenacious, dogged, persevering, unrelenting, relentless, implacable, inexorable, never-say-die, diehard; hard-core, inveterate, absolute, unqualified, unmitigated.3. strict, severe, stern, austere, spartan, harsh, Inf. hard as nails, tough; uncompromising, inflexible, Inf. set in one's ways, narrow-minded, close-minded; ultra-conservative, strait-laced, Sl. straight, on the straight and narrow; unadaptable, unaccommodating, unconformable, nonconforming, noncompliant, uncompliant, noncooperative, uncooperative; stubborn, obstinate, pig-headed, mulish, obdurate, headstrong, willful.4. demanding, exacting, rigorous, stringent, close, tight; scientific, mathematical, nice, accurate, exact, precise, literal, to the letter; well-defined, definite, clear-cut; cut and dried, structured, formal.
A Note on the Style of the synonym finder. 2014.